Heater for incubators



Patented Aug. 3, 1920.

INVENIOR.

VERNER F. DAV l 6 fmm ATTORNEY.

UNITED STATES PATENT. OFFICE.

VERNEB. IE". DAVIS, OF ORANGE,'NEW JERSEY, ASSIGNOR TO PERCY D. PETERS, OF

LITTLE FALLS, NEW YORK. I

HEATER FOR IN GUBATORS.

Specification of Letters Patent.

Patented Aug. 3, 1920.

Application filed April 5, 1919. Serial No. 287,780.

To all whom it may concern Be it known that I, VERNER F. DAVIS, a citizen of the United States, residing at Orange, in the county ofEssex and State of New Jersey, have invented'certain new and useful Improvements in Heatersfor Incubators, of which the following is .a specification, referencebeing had therein to the accompanying drawing.

My invention relates to a heater for incubators and I declare the following to be a full, clear, concise, and exact description thereof sufficient to enable anyone skilled in the art to which it appertainsto make and use the same reference being had to the accompanying drawings in which like reference characters refer to like parts throughout the specification. 7

The object of the invention is to provide a suitable heater for incubators or brooders that will be of simple construction. The heater is equipped with draft doors and vents that respond quickly to any variation in temperature in the incubator or brooder, whereby to keep the temperature therein at a normal degree.

To this end, the heater is provided with draftdoors that are actuated by mechanism controlled by the temperature of the water that passes through the pipes located within the interior of the incubator.

The object will be understood by referring to the drawings in which: ,7

Figure l is an elevation of the heater, showing the mechanism for actuating the draft doors;

Fig. 2 is a vertical section of a fragment of the heater, showing the check or coaling door in wide open position;

Fig. 3 is an enlarged perspective view of the check or coaling door and clevis, showing their relative positions;

Fig. 4 is an enlarged perspective view of the arm or clevis;

Fig. 5 is an enlarged perspective view of a buckle employed;

Fig. 6 is an enlarged perspective view of a throttle rod and throttle valve employed, showing the relative position of a cross pin mounted in said throttle rod.

Referring more particularly to the drawings, the heater is represented by -1 and has a check or coaling door 2, which is provided with the arms 33, whereby it is hinged upon trunnions or pivots carried by the lugs 4-4 formed integral with the heater frame.

' The door 2 is operated open and shut automatically, whereby to check or increase the draft of the fire in the heater -1 by the lower end 5 of an arm or rock clevis 6.

The clevis 6 is fulcrumed at 7 to the brackets 8-8 formed integral with the frame of the heater 1. The opposite end of the clevis 6 is bifurcated and its ends straddle the throttle rod 9 which carries a cross pin 10. The pin 10 is adapted to bear down on thebifurcated ends of the clevis 6 and rock said clevis 6 upon its fulcrum 7 whereby to cause it to open the check or coaling door 2.

The upper end of the throttle rod 9 is screw mounted to the aperture 15 of a buckle 16 and locked by a nut 18. The buckle 16 being used to allow a certain amount of longitudinal adjustment for the rod 9. The upper bifurcated ends 17-17 of the buckle 16 have alining holes, which form bearings for a pin or shaft carried by the end 35 of the lever20. The lower end of the throttle rod 9 passes through an aperture in the throttle valve 11 which seats on the ring 12 formed in the top portion of the frame of the heater 1--. The aperture in the throttle valve 11 for the projection of the throttle rod 9 is sufficiently large topermit the rod 9 to continue to operate downward after the valve 11 is seated if necessary. The adjustable lock nuts 1414 are mounted upon the throttle rod ,9 below the throttle valve 11, whereby to elevate said valve 11 to aid in creating a draft when desired.

The lever 20 is fulcrumed at 21 to a bracket 22 fastened to the tank 25 which contains a float 26 that is connected to he lever 20 bv a link 27. The link 27 is pivoted at 28 to said lever 20. The opposite end of the lever 20 from that to which the rod 9 is attached is threaded for mounting the adjustable weight 30, whereby the tilting of the lever 20 can be controlled to a very fine degree in order to respond more or less quickly to any change in temperature within the incubator. The lever 20 is formed with a bend or offset at 31 to clear the edge of the tank 25 and thereby allow for the proper tilting of the lever 20. l

The lever 20 is connected also to the lower draft door 32 of the heater -1 by a stiff wire 33 and a chain 34. The chain 34 being used to localize the slack adjacent said lever 20. The door 32 is hinged at 3535"to the frame of the heater -l.

The operation of the heater xunder :normal draft conditions is such thatwhen the temperature of the water is sufficient to "heat the incubator to the proper degree its volume in the tank 25 will be expanded :tosuch ra point that the outer end 35 ofcthe lever 20 will have been depressed to lower the rod ,9.and ,seatthe valve 11 upon itsringorseat '12, thereby checking the draft. "The chain 34 and Wire33 will-.havebeenloweredsimultaneouslygto close the draftdoor 32. Should the closingof the-throttle valve 11 and the draft door'321be insuflicient' to checkthe fire and the temperature of @the water .in the incu'bator still increase, the expansion of said wa'ter'in the-tank 25- duejjto such'increasedlheat will cause the float 26 :to, rise higher ,and tilt the "lever 20 to a greater angle, whereby the rod-'9 will descend stillfarther, thereby causinjgvthepin 1'0 ;-to.make contact with thebiturca'ted ends o'fithe arm or \clevis I6. This 'contac'tr-oflthe pin 10 .with'the arml6 willrock the arm or clevis 6 upon its fulcrum 7, whereby (the end 5 thereof will open the ,ch-ec'k or coa'ling doorl2, so as to eifect a lower temperature lin 'lt'he'incubator to that of the desired degree. 7 V I 0n the other hand shouldithe temperature of #the water in .the incubator become lower than the desired degree, the expansion of the water in the tank25 vwill decrease to a smaller volume, thereby lowering the float 26 and elevating the end of the lever 20. The elevationof the end'35 of the lever 20 will effect an elevation of the rod?) which action will result 'first in closing thec'heckor coaling door12. 'Ifit'he rod'9 still continues to rise under "the influence of the decreased volume of-the water .in tank '26, the throttle valve 11 willbe unseated andtthe draft door 32 be opened, the latter by means of its connection withitheilever 20 through the chain 39: and wire33. "The unseating otlthei'throtl claim as new and desire --te-rs Patent 1s:

'fire. and {throttle theater.

Having thus described my invention what to secure by Let- 1. d'naheater for incubators,;adraftdoor under the fire, aithrottle valve over the fire, a check door between the fire and throttle valve, a float, a lever operatively governed by said-float, amid-connecting the lever and vthrottle valve, a 'clevis fulcr'umed to said heater, a 'pin .carriedby said rod, and adapted to actuate said ch'eck door, and a chain connecting said flever with the draft door under the 'fire, whereby to actuate said draft t oor. r

2. In a heater for incubators, a draft door under the fire, and an -,a.djustable throttle valve over the fire, .a check door between the valve, afloat, a'lever operatively governed by said ,fioat, an adjustable rod connecting the lever and throttle valve, :1 clevis iulcrumed to said heater, a pin carried by said adjustable rodand adapted to actuatesaidcheckzdoor,;and a wire and chain connecting said lever with the draft ndoor under the fire, whereby itoactuate said draft door, to control ,the ffir 3. 'lnailheater 'forincubators or brooders having .a-coal ifire a draft door under the fire, a throttle valve cover :the fire, a check dooradapted forluse-asa coalfeed door and located "between the fire and the throttle valve, afloat, a lever o peratively,governed bv said fioatand so arranged as to open the check doorwhen the draft door under the fireand the throttle valve are closed.

In testimony whereof I have aifixed my signature. V

' F, DAVIS. Witnesses Lnsmn J. SIceINs, I W. Soo'rr S'rIoKLEY. 

